LTO 2 : 200 GiB * 2 = 400 GiB

LTO 3 : 400 GiB * 2 = 800 GiB

Note that the factor 2 is used because 2 is the assumed compression ratio of the tape drives. If the compression ratio is different, the factor must be changed appropriately.

For information on how to extend FSE disk buffer with additional file systems or volumes, see chapter ”Monitoring and maintaining FSE”, section ”Extending storage space of FSE disk buffer” on

page 176.

•The target medium should not contain any valid data or header such as a tar archive label or an ECMA / ANSI label.

•The target medium should not be initialized.

•The target medium should not belong to any FSE media pool that is already assigned to an FSE partition.

Normal duplication

When all duplication prerequisites are met, and the original and target media are prepared, you can make a duplicate of the original medium using the following command:

fsemedium --duplicate SourceBarcode TargetBarcode [--no-monitor]

If you do not want to monitor the medium duplication progress, specify the --no-monitoroption as shown in the command syntax above. Otherwise, the duplication progress will be reported to the standard output.

Forced duplication

When any of the last three duplication prerequisites is not met and normal duplication fails, you can still duplicate to the target medium if you use forced duplication functionality. You can perform a forced medium duplication using the following command:

fsemedium --duplicate SourceBarcode TargetBarcode [--no-monitor] --force

CAUTION: Since forced duplication overwrites any data that is stored on the target medium, data loss may occur on the target medium.

Example output for a medium duplication with enabled monitoring, using single tape drive

fsemedium --duplicate 123123 456456 [11:42:09] Started.

[11:42:09] Requesting resources...

[11:42:09] Resources allocated.

[11:42:09] Medium 123123 is already present in drive drv1.

[11:42:09] Starting Back End Agent.

[11:42:10] Medium 123123: 2 volumes found.

[11:42:10] Medium 123123, volume 1: Reading volume identification...

[11:43:48] Medium 123123, volume 1: Reading data.

[11:43:58] Medium 123123, volume 1: Volume read and written to disk buffer.

[11:44:10] Medium 123123, volume 2: Reading volume identification...

[11:44:48] Medium 123123, volume 2: Reading data.

[11:45:58] Medium 123123, volume 2: Volume read and written to disk buffer.

[11:43:58] Reading finished, releasing resources.

106 Managing media